On 25-Aug-02, Robert M. Muench wrote:
> Hi, can some help me with this:
> list: [name string! birthday date!]
> field: pick list 1
> type: pick list 2
>>> type? Type
> == word!
> What I want to do is to set field to a value of type 'type.
> Something like:
> switch type [
> string! [value: "test"]
> ]
> to-set-word field reduce[make to-type type value]
> Is something like this possible? Robert
Indeed it is, as I've just found out...
to-type: func [type [datatype!] value [any-type!]][
make type value
]
>> to-type string! [EMAIL PROTECTED]
== "[EMAIL PROTECTED]"
>> to-type string! 'hello
== "hello"
>> to-type integer! "999"
== 999
Converting a word in a block to the datatype! type is slightly tricky
though...
>> blk: [string!]
== [string!]
>> type? blk/1
== word!
>> blk: reduce blk
== [string!]
>> type? blk/1
== datatype!
So to do what you were attempting at the start...
>> list: [name string! birthday date!]
== [name string! birthday date!]
>> field: pick list 1
== name
>> type: first reduce reduce [pick list 2]
== string!
That makes 'type a datatype!...
>> type? type
== datatype!
so we can now use it in the above function...
>> to-type type field
== "name"
HTH.
--
Carl Read
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